问题
单项选择题
大叶性肺炎
A．铁锈色痰
B．咯血颜色鲜红
C．砖红色胶冻样血痰
D．咯血颜色暗红
E．浆液性粉红色泡沫样血痰
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
大叶性肺炎
A．铁锈色痰
B．咯血颜色鲜红
C．砖红色胶冻样血痰
D．咯血颜色暗红
E．浆液性粉红色泡沫样血痰
参考答案：A
考虑定义在事务集(T1，T2，T3) 上的调度S1和S2，S1与S2是否是冲突等价的为什么
| S1 | S2 | ||||
| T1 | T2 | T3 | T1 | T2 | T3 |
| read(P) | read(Q) | ||||
| read(Q) | read(P) | ||||
| write(Q) | write(Q) | ||||
| write(Q) | write(Q) | ||||
| write(P) | write(P) | ||||
| write(P) | write(Q) | ||||
| write(P) | write(P) | ||||
| read(P) | read(P) | ||||